Cutting them down a bit and/or limiting them to fewer Part types might be worth a try, though...
I'm not sure you understand the impact that would have, though. The fewer cross-slot effects, the more heavily each will be used. If I pull +TrapSkill and +%Propulsion from the crossover list, that means that, for example, you'll see +%Computer about 20% more often.
Now that I think of it what I really meant was that reducing the number of overall effects a given part has (no matter if it's crossover or not) would be worth a try. Which is what you did
. Cheers!
